four people are chosen, what is the probability that two are born in the same month

Answers

Answer 1

If four people are chosen, what is the probability that two are born in the same month is 99.74%.

There are 12 months in a year, so there are 12 choices for the birth month of the first person, 12 choices for the birth month of the second person, and so on.

The total number of ways to choose 4 people from a group of n people is given by the combination formula: C(n,4) = n! / (4!(n-4)!)

Therefore, the probability that two people are born in the same month is:

P = 1 - C(12,4) / C(48,4) = 1 - (495 / 194580) = 0.9974

So the probability is approximately 0.9974, or 99.74%.

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Answer 2

The probability that exactly two of the four people are born in the same month is:

660 / 4956 = 0.1333 or approximately 13.33%

Assuming that each of the twelve months is equally likely to be chosen and that the probability of being born on any particular day is independent of the month,

we can calculate the probability that two people are born in the same month as follows:

First, we can calculate the total number of ways that four people can be chosen from a population, which is given by the combination formula:

C(4, 4) = 1

This means that there is only one way to choose all four people from the population.

Next, we can calculate the number of ways that we can choose two people who are born in the same month.

There are 12 choices for the month in which the two people were born, and once the month is chosen,

we can choose any two people from the population in C(2, 2) = 1 way.

Thus, the total number of ways to choose two people who are born in the same month is:   12 * 1 = 12

Finally, we can calculate the number of ways to choose the remaining two people who are not born in the same month. Since we have already chosen two people who are born in the same month, we must choose the remaining two people from the remaining 11 months. We can do this in C(2, 2) * C(11, 2) = 55 ways.

Therefore, the total number of ways to choose four people such that exactly two are born in the same month is:

12 * 55 = 660

The total number of ways to choose four people from a population of individuals is 1 + C(12, 1)*C(11,3) + C(12,2)*C(10,2) + C(12,3)*C(9,1) + C(12,4) = 4956

Thus, the probability that exactly two of the four people are born in the same month is:

660 / 4956 = 0.1333 or approximately 13.33%

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Related Questions

There are 7 women and 5 men in a department. How many ways can a committee of 4 people be selected? How many ways can this committee be selected if there must be 2 men and 2 women on the committee? How many ways can this committee be selected if there must be at least 2 women on the committee?

Answers

There are 420 ways to select a committee of 4 people with at least 2 women.

To solve these problems, we can use the formula for combinations. The number of ways to choose k items from a set of n items is given by:

C(n, k) = n! / (k! * (n - k)!)

where "!" denotes the factorial function.

To select a committee of 4 people from a pool of 12 people, we can use the formula:

C(12, 4) = 12! / (4! * 8!) = 495

So there are 495 ways to select a committee of 4 people without any additional criteria.

To select a committee of 4 people with 2 men and 2 women, we can first count the number of ways to choose 2 men from the 5 men and 2 women from the 7 women. This gives us:

C(5, 2) * C(7, 2) = (5! / (2! * 3!)) * (7! / (2! * 5!)) = 10 * 21 = 210

So there are 210 ways to select a committee of 4 people with 2 men and 2 women.

To select a committee of 4 people with at least 2 women, we can count the number of committees with exactly 2 women, 3 women, or 4 women, and add them together.

The number of committees with exactly 2 women is:

C(7, 2) * C(5, 2) = 21 * 10 = 210

The number of committees with exactly 3 women is:

C(7, 3) * C(5, 1) = 35 * 5 = 175

The number of committees with all 4 women is:

C(7, 4) = 35

So the total number of committees with at least 2 women is:

210 + 175 + 35 = 420

Therefore, there are 420 ways to select a committee of 4 people with at least 2 women.

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Is line used to define an angle?

Answers

Yes, line is used to define an angle.

What is an angle measure?

When two lines or rays intersect at a single point, an angle is created. The vertex is the term for the shared point. An angle measure in geometry is the length of the angle created by two rays or arms meeting at a common vertex.

When two straight lines or rays intersect at a single endpoint, an angle is created.

The vertex of an angle is the location where two points come together.

The common point is referred to as the vertex.

The length of the angle formed when two rays or arms intersect at a common vertex is known as an angle measure in geometry.

A straight line is a straight angle.

Therefore, two lines are used to define an angle.

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so if you divide 30 by 775 how would get the remainder

Answers

The remainder of 30 divided by 775, is 0.0387.

What is division?

The division in mathematics is one kind of operation. In this process, we split the expressions or numbers into the same number of parts.

The number 30 is called the numerator or dividend, and the number 775 is called the denominator or divisor.

The quotient of 30 and 775,

30 divided by 775,

that means,

30/775

= 0.0387, this is the remainder.

Therefore, 0.0387 is the remainder.

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An experiment is conducted with a bag of marbles containing 5 white and 2 blue marbles. The results of a marble being drawn twice and replaced 100 times are shown in the table. Outcome Frequency White, White 27 White, Blue 22 Blue, Blue 18 Blue, White 33 Find P(1 blue).

Answers

The probability of getting one blue marble out of the two is; 0.55

How to find the probability of selection?

The parameters given are;

Number of white marbles = 5

Number of blue marbles = 2

Now, from the results of a marble being drawn twice and replaced 100 times we have;

White, White = 27

White, Blue = 22

Blue, Blue = 18

Blue, White = 33

Thus, probability of getting one blue marble is;

P(White, Blue) + P(Blue, White)

= (22/100) + (33/100)

= 55/100

= 0.55

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A satellite is at a distance of 1.3776 x 108 feet from the center of Earth. There are approximately
3,280 feet in a kilometer. What is the distance in kilometers between the satellite and the center of Earth?
Write your answer in scientific notation.
Enter only your answer in the space provided.

Answers

Answer:4.2 x 10^4 your welcome

Step-by-step explanation:

Solve the following equation: 5/3e^x-1 – 2 = 4
Step by step

Answers

Answer: x=1.435084

Step-by-step explanation: 5/3e^x-1-2=4

5/3(2.718282x)−3=4

5/3(2.718282x)−3=4,

Step 1: Add 3 to both sides.

5/3(2.718282x)=7

Step 2: Divide both sides by 5/3.

Look at the photo⬇

Solve the following equation: 5/3e^x-1 2 = 4 Step by step

Help the picture is above I’ll mark you as brainliest please show the work too.

Answers

Answer: what are you doing stepbro

Step-by-step explanation: i like doggos :)

7x−1)+(−x−2) pls help

Answers

Answer:

-7x²-13x+2

Step-by-step explanation:

-7x²-14x+1x+2

in a certain industrial facility, accidents occur infrequently. it is known that the probability of an accident on any given day is 0.005 and accidents are independent of each other. what is the probability that in any given period of 400 days there will be an accident on one day? use binomial approximation to poisson distribution.

Answers

The probability that in any given period of 400 days there will be an accident on one day is 0.2707

Given that;

In a certain industrial facility, accidents occur infrequently. it is known that the probability of an accident on any given day is 0.005 and accidents are independent of each other.

n = 400, p = 0.005

Poisson distribution is given by;

e P(x) = (λˣe^λ ) / x!

Here, Mean(λ) = np

                        = 400*0.005

                        =2

The probability that there will be an accident on one day;

(P(x = 1)) = (λxe-λ)/x!

             = 2*e-2

             = 0.2707

The probability that in any given period of 400 days there will be an accident on one day is 0.2707

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Identify whether the two graphs would form paraffeſ finesperpendicular lines, or neither parallel nor perpendicular lines.

Identify whether the two graphs would form paraffe finesperpendicular lines, or neither parallel nor

Answers

Answer:

neither

Step-by-step explanation:

the slope of the first seems to be 1/5 while the second looks to be 2/5

???????????????????????

???????????????????????

Answers

Answer:

0.040 "<" 0.207

Step-by-step explanation:

0.040

0.207

We can see that there is a 2 in 0.207 in the tenths spot, which automatically makes it larger than 0.040.

Write an inequality using the "<" sign:

0.040 < 0.207.

Hope this helps!

< is the answer! Your welcome, hope it helps.

Multiply the complex numbers (5 − 3i) and (9 + 2i).

Answers

The answer is

51-17i

Explanation :

5x95x2i-3ix9-3ix2i
45+10i-27i-6^2
45+10i-27i-6(-1)
45+10i-27i + 6

Solve for p 7(p - 9) = -34.3
p=__?

Answers

the answer should be p=4.1

Answer: p = 4.1

Step-by-step explanation:

Gregs mom baked 24 vinnies mom baked 36 brads mom baked twice as much multipley it its 3..2..1.. (24+36)x2=120 hope this helps u!!!!

Answers

Gregs's mom baked 24 cookies, while Vinnie's mom baked 36 cookies. Brad's mom baked twice as much as Greg's mom, resulting in a total of 48 cookies. The total number of cookies that were baked is found by adding the number of cookies that each mom baked:

24 + 36 + 48 = 108.

The cookies can be divided into 3 groups of 36, 4 groups of 27, 6 groups of 18, 9 groups of 12, 12 groups of 9, 18 groups of 6, 27 groups of 4, or 36 groups of 3 cookies. Since there are more than 100 words required, let's talk about the importance of fractions and equivalent ratios.

In conclusion, Greg's mom baked 24 cookies, Vinnie's mom baked 36 cookies, and Brad's mom baked 48 cookies, resulting in a total of 108 cookies. The cookies can be divided into fractions or equivalent ratios to distribute them evenly among the children.

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4) What fractions are greater than 2/3? * 1/2 8/12 3/8 6/6 4/5 9/10​

Answers

The fractions that are greater than 2/3 are 6/6, 4/5, and 9/10.

To determine which fractions are greater than 2/3, we need to compare them to 2/3 and see which ones are larger.

1/2 is less than 2/3 because 1/2 is equivalent to 3/6, which is less than 4/6 (i.e., 2/3).8/12 can be simplified to 2/3, which is not greater than 2/3.3/8 is less than 2/3 because 2/3 is equivalent to 8/12, which is greater than 3/8.6/6 is equivalent to 1, which is greater than 2/3.4/5 is greater than 2/3 because 2/3 is equivalent to 8/12, and 4/5 is equivalent to 9.6/12, which is greater than 8/12.9/10 is greater than 2/3 because 2/3 is equivalent to 8/12, and 9/10 is equivalent to 10.8/12, which is greater than 8/12.

Therefore, the fractions that are greater than 2/3 are 6/6, 4/5, and 9/10.

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(4y + 5) + (-7y - 1)

Answers

Answer:

-3y+4

Step-by-step explanation:

(4y + 5) + (-7y - 1)=

4y-7y+5-1=

-3y+4

Determine the distance between the points (−3, −6) and (5, 0).

Answers

The distance between the points (-3, -6) and (5, 0) is 10 units.

What is the Pythagorean theorem?

Pythagoras Theorem is the way in which you can find the missing length of a right angled triangle.

To determine the distance between two points in a coordinate plane, you can use the distance formula, which is derived from the Pythagorean theorem.

The distance formula for two points (x₁, y₁) and (x₂, y₂) in a coordinate plane is:

Distance = √{(x₂ - x₁)² + (y₂ - y₁)²}

Given the two points (-3, -6) and (5, 0), we can plug in the values into the distance formula as follows:

x₁ = -3, y₁ = -6 (coordinates of the first point)

x₂ = 5, y₂ = 0 (coordinates of the second point)

Distance = √{(x₂ - x₁)² + (y₂ - y₁)²}

= √{(8)² + (6)²}

= √{(64) + (36)

= √100

= 10

Hence, the distance between the points (-3, -6) and (5, 0) is 10 units.

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HELPPPPPPPPPPP PLEASE

HELPPPPPPPPPPP PLEASE

Answers

Answer:

A) -1

Step-by-step explanation:

To solve this, simply plug in 2 for x.

f(x)= -3x+5

f(x)= -3(2)+5

Now solve the multiplication.

f(x)= -6+5

Now add

f(x)= -1

So the answer is -1

Answer:

f = -1/2

Step-by-step explanation:

plug in 2 for (x):

f(2)=[-3(2)+5]

Solve right side:

[-3*2=-6

-6+5 = -1] = -1

Solve for f:

f(2) = -1

/2 /2

f= -1/2

easy 10 points (question is down below, thank you.)

easy 10 points (question is down below, thank you.)

Answers

answer:

Step-by-step explanation:

Part A
Write - 1/33 as a decimal.

Answers

Answer:

0.030303...

Step-by-step explanation:

i put the dots because this is a repeating decimal

Answer:

0.03030303030303.

Complete the square and solve.
x^2+3x=3

Please show how you get your answer!​

Answers

Therefore, the solutions to the equation x² + 3x = 3 are x = -3/2 + √(21)/2 and x = -3/2 - √(21)/2.

What is equation?

An equation is a mathematical statement that shows the equality of two expressions. It usually consists of two sides separated by an equal sign (=). The expressions on both sides of the equal sign can include numbers, variables, and mathematical operations such as addition, subtraction, multiplication, and division.

Here,

To complete the square for the expression x² + 3x, we need to add and subtract (3/2)² = 9/4 inside the parentheses, as follows:

x² + 3x = x² + 3x + 9/4 - 9/4

= (x + 3/2)² - 9/4

Now the left-hand side can be written as:

(x + 3/2)² - 9/4 = 3

Adding 9/4 to both sides, we get:

(x + 3/2)² = 3 + 9/4

= 21/4

Taking the square root of both sides, we get:

x + 3/2 = ±√(21)/2

Subtracting 3/2 from both sides, we get the two solutions:

x = -3/2 ± √(21)/2

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OKAYYYYYYYYYY- I NEED HELP LIKE ASAP! I WILL GIVE YOU BRAINLIEST!

OKAYYYYYYYYYY- I NEED HELP LIKE ASAP! I WILL GIVE YOU BRAINLIEST!
OKAYYYYYYYYYY- I NEED HELP LIKE ASAP! I WILL GIVE YOU BRAINLIEST!

Answers

Answer:

R=(-2,-8)

S=(1, -8)

T=(1, -4)

U=(-2,-4)

Step-by-step explanation:

• R (-9,-8)

• S ( -6,-8)

• T (-6,-4)

• U (-9,-4)


The bookstore sold m books on Monday and t books on Tuesday. But on Wednesday, r books were
returned. Write the expression for the total books sold.

Answers

Answer:

m+t-r

Step-by-step explanation:

How do I solve this hmm

How do I solve this hmm

Answers

Answer:

put the numbers that are x into the equation. you always try to find y in this problem

Step-by-step explanation:

y=x+8

the first x is 0 so we do

y= 0+8

y=8

and you keep repeating this where x=1 and x= 2

If one item is chosen from m items, a second item is chosen from n items, and a third item is chosen from p items, the total number of three-item choices is?

Answers

If one item is chosen from m items, a second item is chosen from n items, and a third item is chosen from p items, the total number of three-item choices is MNP.

What is probability?

Probability  can be regarded as a  measure of the likelihood of an event  that can take place.

It should be noted that  Many events cannot be predicted with total certainty, hence , If one item is chosen from m items, a second item is chosen from n items, and a third item is chosen from p items, the total number of three-item choices is MNP.

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pls answer I give brainliest

pls answer I give brainliest

Answers

Answer:

8

Step-by-step explanation:

Solve Y = 41,8.2 + 12

Answers

Answer:

Step-by-step explanation:

Y=41*8.2+12

Y=336.2+12

y=348.2

The answer to this equation is 348.2

what is 2 1/3 + 3 1/3 -10

Answers

Answer:

Simplify the expression.

Exact Form:

−  13/ 3

Decimal Form:

− 4. ¯ 3

Mixed Number Form:

− 4  1/ 3

Hope this helps!

Find f/(x). (a) f(x) = xsinx (b) f(x) = sech-1x²

Answers

The derivative of f(x) = sech^(-1)(x^2) is f'(x) = 2x/sqrt(1 - x^4).

a) To find f'(x) for f(x) = x*sin(x), we can use the product rule and the derivative of the sine function.

Using the product rule, we have:

f'(x) = (xsin(x))' = xsin'(x) + sin(x)*x'

The derivative of sin(x) is cos(x), and the derivative of x with respect to x is 1. Therefore:

f'(x) = x*cos(x) + sin(x)

So, the derivative of f(x) = xsin(x) is f'(x) = xcos(x) + sin(x).

(b) To find f'(x) for f(x) = sech^(-1)(x^2), we can use the chain rule and the derivative of the inverse hyperbolic secant function.

Let u = x^2. Then, f(x) can be rewritten as f(u) = sech^(-1)(u).

Using the chain rule, we have:

f'(x) = f'(u) * u'

The derivative of sech^(-1)(u) can be found using the derivative of the inverse hyperbolic secant function:

(sech^(-1)(u))' = 1/sqrt(1 - u^2)

Since u = x^2, we have:

f'(x) = 1/sqrt(1 - (x^2)^2) * (x^2)'

Simplifying:

f'(x) = 1/sqrt(1 - x^4) * 2x

So, the derivative of f(x) = sech^(-1)(x^2) is f'(x) = 2x/sqrt(1 - x^4).

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Sketch a right triangle with θ as the measure of one acute angle. Find the other five trigonometric ratios of θ. sinθ=0.35

Answers

Given that the measure of an acute angle θ of a right triangle and sin θ = 0.35To find the other five trigonometric ratios of θ, we can use the Pythagorean theorem, which states that\((sin θ)² + (cos θ)² = 1\) .

Now, \(sin θ = 0.35\) Let's assume that the adjacent side = x, and the hypotenuse = h;

then the opposite side is\(h² - x²\), according to the Pythagorean theorem. Thus, we have:

\(sec θ = hypotenuse / adjacent side\)

\(= h / x\)

\(cosec θ = hypotenuse / opposite side\)

\(= h / (h² - x²)^1/2\)  We have now found the values of the other five trigonometric ratios of θ.

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